Goldschmidt 2007 will include symposia covering the full range of geochemistry. The main scientific themes, together with the members of the International Program Committee responsible for them, are shown below. The committee members will organize several symposia for each of the themes. Suggestions for symposia or ideas for general symposia should be addressed to the IPC members responsible for the relevant theme as soon as possible, or sent to the chair of the IPC (Herbert Palme, herbert.palme at uni-koeln.de).

(1)	New Developments in Analytical Methods:	C. Münker (muenker @ uni-bonn.de)
(2)	Exploiting and Preserving Natural Resources:	M. Meyer (m.meyer @ rwth-aachen.de), T. Vennemann, V. Lueders, R. Herrington, B. Bodnar
(3)	From Dust to Planets:	M. Trieloff (trieloff @ min.uni-heidelberg.de), A. Pack, M. Bizzarro
(4)	Early Earth:	K. Mezger (klaush @ nwz.uni-muenster.de), R. Frei
(5)	Earth's Mantle:	A. Hofmann (hofmann @ mpch-mainz.mpg.de), W. McDonough
(6)	Earth's Crust:	F. Holtz (F.Holtz @ mineralogie.uni-hannover.de), R. Rudnick
(7)	Subduction Processes:	S. Foley (foley @ uni-mainz.de)
(9)	Geochemical Constraints on Duration of Geologic Processes:	S. Chakraborty (Sumit.Chakraborty @ rub.de), S. Mukhopadhyay
(10)	Biogeochemistry and the Origin and Evolution of Life:	L. Schwark (lorenz.schwark @ uni-koeln.de), J.S.S. Damste
(11)	Water in Planetary Systems:	H. Keppler (hans.keppler @ uni-bayreuth.de), B. Marty
(12)	Geochemistry of Surface Processes:	F. v. Blanckenburg (fvb @ mineralogie.uni-hannover.de), R.E. Blake
(13)	Atmospheres and Oceans:	A. Eisenhauer (aeisenhauer @ ifm-geomar.de)
(14)	Environmental Geochemistry and Mineralogy:	S. Weinbruch (dh6d @ hrzpub.tu-darmstadt.de), J. Matschullat, D. Vaughan
(15)	Mechanisms of Geochemical Reactions in Experiments and Nature:	A. Putnis (putnis @ nwz.uni-muenster.de), L. Baumgartner
(16)	Applied Mineralogy:	H.-J. Kleebe (kleebe @ geo.tu-darmstadt.de), T. Sharp